The effects of compost (5, 7.5 and 10 ton/fed), NPK (50, 75 and 100%) and/or Effective micro-organisms/Minia Azotein fertilization on plant height, number and dry weight of flowering tops/plant and essential oil productivity (% and yield/plant) were investigated during 2012/2013 and 2013/2014 at the experimental farm, Fac. of Agric., Minia Univ.
All treatments of compost significantly increased, plant height, number and dry weight of flowering tops/plant, as well as, essential oil percent and yield/plant. The high level of compost was more effective in this concern.
The used of mineral NPK (100%) followed by 75% NPK + E.M. + M.A. treatments were the best results in increasing all previous characters.
Generally supplying yarrow plants with compost at the rate of 10 ton/fed and fertilizing plants with NPK (100%) or reduce dose at (75% NPK) plus E.M. + M.A. gave overall the highest values of previous traits.